Hi,
Well, whaddayaknow. It works. I wrote I connected the Mustek to a
noname NCR810 card, but actually it was connected to my Asus
SC200 SCSI card. Ah well, shouldn't matter, thinks me.
But it turns out it does matter. The scanner now IS connected
(solely) to the noname NCR810 card, the rest (ZIP and CDROM) is
on the SC200. No more colored stripes.
I'm still curious. Anybody ANY idea what was going on?
> > I've read somewhere (in SANE docs?) that this Mustek should be
> > terminated (by me). But my active terminator makes the line
> > phenomena a lot worse. What is it with this scanner? Doesn't it
> > follow SCSI specs, or has it auto-termination?
> I wouldn't trust scanners to follow SCSI specs, specially if they come
> as a package with SCSI card etc. My acer caused problems with other
> devices on the same chain until I removed from the PCB a bunch of capacitors
> they had put on the SCSI signal lines. They either put them on for EMI or
> an attempt to sort of terminate but caused too much reflection when you
> had other devices on the chain which were using faster data rates.
I've got an old SONY-cdrom with similar thingies to what you
describe. I'm quite sure they're for passive termination. If I
remember clearly, passive termination consists of resistors of a
certain Ohm, active termination actually keeps a certain voltage on
the signal lines (with thyristors?.)
cheers
Ferenc
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This archive was generated by hypermail 2b29 : Sun Jan 21 2001 - 13:51:34 PST